Molding-machine.



W. H. HOFMANN.

MOLDING MACHINE. APPLICATION FILED oozms, 1905.

Patented Sept. 13,1910.

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W1 TNESSES:

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APPLICATION FILED 00'1.26, 1906. 970,334.

Al/orney INVENTOR Wm BY Wfl/EM M UHW VW/TNESSES:

UNITED STATES PATENT OFFICE.

WALTER H. HOFMANN, 0F UNION HILL, NEW JERSEY, ASSIGNOR TO RICHEY, BROWNEAND DONALD, OF MASPETH, NEW YORK.

MOLDING-MACHINE.

1 '0 all whom it may concern:

Be it known that I, WALTER H. HOFMANN, a citizen of the United States,and a resident of Union Hill, in the county of Hudson and State of NewJersey, have invented a new and useful Molding-Machine, of which thefollowing is a specification.

My invention relates to molding machines, and has for its object theprovision of a machine of this class which is economical inconstruction, simple, light, is not liable to get out of order, and isadapted for use with many different forms of pattern.

The machine is of particular advantage in molding large work such asdoors and frames. It can be advantageously and economically used for alarge range of work varying from doors and frames to risers and treads,and is in fact used to advantage in all kinds of architectural housemetal work. The patterns may be made of wood or metal.

The nature and advantages of my invention are more particularlydescribed hereinafter with reference to the accompanying drawing whichillustrates exemplifying structures embodying my invention, and inwhich:

Figure 1 is a side elevation of one form of my invention, one half insection, taken on a vertical plane through the longitudinal center line;Fig. 2, an end elevation of the same; Fig. 3, a sectional elevation onthe line au-zv, Fig. 1; Fig. 4, a plan view of Fig. 1; Fig. 5, a planview of a portion of the pattern plate; and Fi 6, a detail view.

1 are stand ards, one at each end of the machine.

2 is a bed plate supported by the standards, and suitably securedthereto; 3, vertical inner walls of the adjustable plates, forming aninclosure in which the pattern plate moves; 4, boxes or guides carriedby the standards 1; 5, plungers, preferably of angular construction,vertically movable in the guides 4; 6, the pattern carrying frame,resting upon the top of the plungers 5, and suitably secured thereto; 7,journal plates secured to the standards; 8, rock shafts, preferably twoin number, j ournaled on the plates 7 9, arms upon said rock shafts,preferably one at either end of each shaft; 10, links, each pivotallyconnected at one end to one of said arms 9 on one of said rock shafts 8,and at its other end to the arm on Specification of Letters Patent.

Application filed October 25, 1905.

Patented Sept. 13, 1910.

Serial No. 284,384.

the other rock shaft opposite the arm first mentioned; 11, an operatinglever; 12, a suitable mounting on one of the rock shafts 8 whereby thelever 11 is secured to the same; 13, toggle arms on said shaft 8,preferably one at each end of said shaft; 14, toggle links, preferablyone corresponding to each arm 13, each connected at one end pivotallyto' one of said arms, and at the other or upper end pivotally connectedto the pattern plate 6; the lever, rock shafts, connecting links, togglearms and toggle links serve to move the pattern plate vertically uponmanipulation of the lever; 15, spring brackets, one at either end of themachine, suitably connected to the standards 1 and the bed-plate 2; 16,suitable springs, preferably double-elliptic springs, one at either endof the machine, resting at 17 on the brackets 15, and suitably securedthereto, and at 18 suitably secured to the attern carrying frame 6,serving to equallze the motion of the pattern plate; 19, adjustable sidemembers of the stripping plate resting on the bed 2; 19, rigid endmembers of the stripping plate, secured on the ends of bed 2; 20, apattern plate carrying either the cope or nowel pattern; 21, the generaldesignation of quick acting clamping devices for securing side members19 of the stripping plate in adjusted position and for securing thepattern plates to pattern carrier 6; 19", lateral extensions ofadjustable stripping plate members 19; 19, T-slotted guides in members19, preferably passing through extensions 19"; 23, nuts or headsengaging the lower flanges of guides 19; 24, bolts carrying nuts 23 andpassing through the side members of table 2; 21., handles, one for eachof the clamping devices 21, which serve by suitable mechanism to drawnuts 23 toward the table and clamp members 19 to the table in adjustedposition; the complete construction of these clamping devices may besimilar to that of the clamps for the pattern plates which will now bedescribed; 22, suitable sockets secured to the pattern plates; 22slotted flanges in the sockets, engaged by nuts 23; 25, washers, one oneach bolt 24, straddling slots 26 in the pattern carrying frame; 27,eccentric cams, one pivoted to each bolt 24, and to which handles 21*are connected.

The machine is used as follows: The two halves of the pattern aresecured to boards, forming two pattern plates. These plates are ofconsiderably varying width. In architectural iron work a great many ofthe castings are of substantially the same length. Therefore I haveprovided an adjustment in my machine for width and not for length ofpattern. It will be evident that other adjustments may be provideddepending on the conditions. One of the pattern plates provided withsockets 22 is put on the pattern carrying frame 6 and secured by clamps21. This is done by raising handles 21 of the clamps, inserting the endsof the bolts 24C in sockets 22, moving the bolts in slots 26 until nuts23 engage slotted flanges 22 of sockets 22 and then pulling down handles21, causing eccentrics 27 to pull the patternplates firmly against frame6. It is assumed that lever 11 is raised, and the pattern carrier 6 andplates in elevated position. The adjustable side members 19 of thestripping plate are now moved toward or away from the center of themachine to correspond with the width of the pattern plate and are lockedin position by their clamps 21. The end members 19 of the strippingplate are provided with pins 19 for locating the flasks. It is customaryto place these pins on the "sides of the flasks, but since applicantsstripping plate is made adjustable for width, in the exemplifyingstructure shown the pins are placed on the end members of the plate. Aflask, either the cope or drag according to the pattern plate inposition, is now placed on the stripping plate and accurately located bypins 19. Sand is put in the flask and rammed up in the usual manner; thepattern is removed from the mold by lowering lever 11 which depressesthe pattern carrier 6; the flask is then raised and removed. Theoperation is repeated until. the desired number of drag mold sectionshas been completed; the pattern plate is removed and the other patternplate put in position and the cope flasks rammed up to the numbercorresponding to the drag flasks.

To insure accuracy in positioning the patterns in the flasks, eachpattern plate is marked with a center line and this is lined up with acenter line on the pattern-carrying frame when the pattern plate is putin the machine. The pattern carrier moves in a guide formed by the innerfaces 3 of table 2 and its position is therefore always correct. Pins 19locate the flasks accurately on the machine. Therefore the upper andlower halves of the mold may be quickly prepared with the assurance thatthey will match perfectly. 7

What I claim is:

1. In a molding machine, the comb-ination of a frame, a table thereonhaving a rectangular opening defined by vertical walls, a patterncarrier approximately fitting the opening in the table and guidedthereby, means for raising and lowering the carrier and a strippingplate mounted on the table comprising members adjustable toward and fromthe center of the machine to correspond to different patterns.

2. In a molding machine, the combination of a frame, a table thereonhaving a rectangular opening defined by vertical walls, a patterncarrier approximately fitting the opening in the table and guidedthereby, means for raising and lowering the carrier and a strippingplate mounted on the table 7 comprising movable members which may beadjusted toward and from the center of the machine over the patterncarrier to accommodate different sized patterns, and means for securingthe movable members in ad justed position.

In testimony whereof I have affixed my signature in the presence of twowitnesses.

WVALTER H. HOFMANN.

